Is it not possible we were always this dumb but more that most of us talked less? This isn't beyond the standard "pub talk" but today that "pub" is the online world and published for all to see. Where previously you'd have reporters and sub-editors and editors to publish; today you can just run your mouth off whenever you want and the crowds can all hear. This sort of thing makes us _look_ dumber compared to the era…
So as before you would say 'dumb' things to your inner social circle of friends, with an occasional stranger overhearing. Today you can say those same things online, but instead of it just being your friends it's effectively on the public record and everyone can see and comment on what you said. This reminds me of a story that Clay Shirky told about how one of his students/coworkers wanted to announce the breakup of…
It seems reasonable to believe that the person misrepresenting is often aware of the context and is disingenuous in their representation. And if not I am not sure why we are giving the stage to people with poor comprehension skills and a correspondingly violent temper.